Support --help, --version and --changelog.

sunrise-commit

@@ -102,6 +102,20 @@ vcs_status() {
 	fi
 }
 
+print_help() {
+	cat <<_EOH_
+Synopsis:
+	sunrise-commit [options] [--] <commit message>
+
+Options:
+	-?, -h, --help		print this message,
+	-V, --version		print version string,
+
+	-c, --changelog		backwards compat (ignored),
+	-v, --verbose		enable verbose output.
+_EOH_
+}
+
 # Guess what!
 main() {
 	local commitmsg
@@ -109,9 +123,22 @@ main() {
 
 	while [ ${#} -gt 0 ]; do
 		case "${1}" in
+			--help|-?|-h)
+				print_help
+				exit 0
+				;;
+			--version|-V)
+				echo 'sunrise-commit 1.0'
+				exit 0
+				;;
+
+			-c|--changelog)
+				# Now changelog entries are implicit -- backwards compat.
+				;;
 			-v|--verbose)
 				SC_VERBOSE=1
 				;;
+
 			--)
 				shift
 				commitmsg="${commitmsg+${commitmsg} }${@}"